In 2018, there were a total of 548 ACOs. While 123 new ACOs joined that year, only a handful of ACOs have persisted since the beginning.
These ACOs served 10096874 patients / beneficiaries in a single year.
506514 providers, including primary care physicians (PCPs), specialists, nurse practitioners, physician assistants, clinical nurse specialists participated in the performance year.
Track 1 ACOs are one-sided risk. In other words, if the ACO meets the savings threshold, they can share in the rewards.
In order to be eligible for savings or penalized for losses, all ACOs have a Minimum Savings Rate (MSR) or Minimum Loss Rate (MLR)